Radiation Measurements最新文献

{"title":"LyoScope: a portable lyoluminescence reader prototype","authors":"Magdalena Biernacka ,&nbsp;Krzysztof Maternicki ,&nbsp;Michał Sądel ,&nbsp;Sebastian Kreutzer","doi":"10.1016/j.radmeas.2025.107545","DOIUrl":"10.1016/j.radmeas.2025.107545","url":null,"abstract":"<div><div>We present the design of <em>LyoScope</em>, a portable, compact device for measuring lyoluminescence (LL). Lyoluminescence is a phenomenon occurring during the dissolution of previously irradiated material. Measurements facilitate the estimation of the total dose absorbed by the material since its last exposure to light, heat, or moisture. Due to its versatility, <em>LyoScope</em> is suitable for both environmental and laboratory measurements. Its elementary design enables self-assembly, such as through 3D printing. We provide a detailed technical description and present first performance tests: the minimum detectable dose for NaCl was determined at ∼5 mGy, repeatability tests on natural halite achieved a variation of only ∼2.4 %, and fading experiments revealed that ∼35–40 % of the LL signal is lost within weeks, followed by stabilization of ∼35–60 % of the signal. In addition, we demonstrate the option of attaching an EM-CCD camera to our setup enabling spatially-resolved LL measurements and a visualization of the dissolution process. Our results underscore that <em>LyoScope</em> enables reproducible LL measurements and support the potential of LL as a complementary tool for dosimetry and geochronology.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107545"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145416881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Copper-based halide Cs3Cu2I5: (X) bulk single crystals: Growth and applications","authors":"Jianjia Li,&nbsp;Yunfei Ren,&nbsp;Zhicheng Wang,&nbsp;Xiaoming Li","doi":"10.1016/j.radmeas.2025.107527","DOIUrl":"10.1016/j.radmeas.2025.107527","url":null,"abstract":"<div><div>Low-dimensional copper-based halides have garnered wide attention due to their strong self-trapped exciton (STE) emission, among which, Cs₃Cu₂I₅ (CCI), characterized by a zero-dimensional electronic structure, exhibits promising application potential across multiple fields owing to its non-toxicity and excellent environmental stability. Notably, its exceptional radioluminescence properties make it an outstanding scintillator material for high-energy radiation detection. In recent years, although reports on diverse CCI material morphologies abound, bulk single crystals have become the primary focus because of their superior light output and low defect density. In this review, we systematically summarize and discuss the growth methodologies and applications of CCI bulk single crystals, which encompasses both melt and solution growth techniques, as well as currently developed and potentially superior application scenarios. Furthermore, we dedicate a section to discuss doping engineering strategies applied to CCI materials and the resultant property enhancements. Finally, the key challenges and future research directions for CCI bulk single crystals are outlined.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107527"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimated organ dose using the size-specific dose estimates (SSDE) and its comparison with direct measurements","authors":"Choirul Anam ,&nbsp;Toshioh Fujibuchi ,&nbsp;Donghee Han ,&nbsp;Riska Amilia ,&nbsp;Noor Diyana Osman ,&nbsp;Geoff Dougherty","doi":"10.1016/j.radmeas.2025.107515","DOIUrl":"10.1016/j.radmeas.2025.107515","url":null,"abstract":"<div><h3>Purpose</h3><div>The aim of this study is to estimate the organ dose using the size-specific dose estimates (SSDE) in an anthropomorphic phantom and compare the results with direct measurements using a pencil ionization chamber and radio-photo-luminescence dosimeters (RPLDs).</div></div><div><h3>Methods</h3><div>Organ dose estimation in computed tomography (CT) examination was performed using the SSDE concept. The central SSDE (SSDE_c) and peripheral SSDE (SSDE_p) were calculated from the weighted SSDE (SSDE_w). A dose map was created from SSDE_c and SSDE_p with interpolation. Organ dose or dose at a specific position was calculated as the average of the dose map within a defined region of interest (ROI). We implemented the algorithm on an anthropomorphic phantom scanned by a Toshiba Alexion™ Access 4-slice CT scanner with both fixed tube current (FTC) and tube current modulation (TCM) modes. A pencil ionization chamber and RPLDs were used to measure the organ dose directly in the anthropomorphic phantom. The Kruskal-Wallis test was performed to assess whether there was any significance difference among the methods.</div></div><div><h3>Results</h3><div>The organ doses estimated using SSDE were comparable with the direct measurements using a pencil ionization chamber and RPLDs. The organ dose estimation using SSDE in FTC mode exhibits a discrepancy of approximately 4.02 ± 0.04 % and 4.59 ± 0.03 % compared to the direct measurements using the ionization chamber and RPLDs, respectively. The differences in the TCM mode are 5.09 ± 0.03 % and 17.91 ± 0.08 % compared to the direct measurements using an ionization chamber and RPLDs, respectively. The statistical analysis yielded a <em>p</em>-value &gt;0.05, confirming the reliability of the SSDE method for organ dose estimation.</div></div><div><h3>Conclusion</h3><div>Organ dose estimation using the SSDE method has been successfully validated. The organ dose using SSDE was comparable to those from direct measurements.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107515"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental evaluation of radon detector performance under controlled conditions: Statistical assessment and calibration strategy","authors":"A. Noverques,&nbsp;B. Juste,&nbsp;C. Trull-Hernandis,&nbsp;G. Verdu","doi":"10.1016/j.radmeas.2025.107532","DOIUrl":"10.1016/j.radmeas.2025.107532","url":null,"abstract":"<div><div>This work presents a quantitative evaluation of radon detectors under controlled environmental conditions using the RDN-SENUBIO-UPV radon chamber. The study emphasizes the statistical assessment of spatial radon distribution and the comparative sensitivity analysis of multiple detector models against a high-precision AlphaGUARD monitor. A comprehensive methodology is developed, involving the calculation of relative errors, analysis of variance (ANOVA), and normality testing (Kolmogorov–Smirnov), to assess measurement consistency. Moreover, individual correction factors are derived and validated through repeated experimental trials to improve the accuracy of time-dependent measurements. The proposed calibration protocol enhances measurement reliability by accounting for detector-specific response dynamics and environmental transients. The results support the implementation of reproducible correction schemes and contribute to improved quality assurance practices in radon monitoring. The approach provides a rigorous statistical framework applicable to other radiation detection systems.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107532"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Composition-dependent properties of CexLa0.95-xTb0.05F3 Nanopowders Tailored for X-ray photodynamic therapy and cathodoluminescence imaging","authors":"X. Lytvynenko ,&nbsp;M. Urbanová ,&nbsp;O. Lalinský ,&nbsp;V. Vojta ,&nbsp;J. Bárta ,&nbsp;L. Prouzová Procházková ,&nbsp;V. Čuba","doi":"10.1016/j.radmeas.2025.107536","DOIUrl":"10.1016/j.radmeas.2025.107536","url":null,"abstract":"<div><div>This study investigates the synthesis and luminescence behavior of Ce_xLa_0.95-xTb_0.05F₃ nanoparticles with varying Ce³⁺ content. The materials were prepared via sol-gel chemical route and thermally annealed to improve crystallinity and reduce defects. Phase composition and structural parameters were examined by X-ray diffraction (XRD), while elemental composition was determined by X-ray fluorescence (XRF). Cathodoluminescence (CL) intensity mapping was used to evaluate emission uniformity and monitor the degradation of luminescence under electron beam exposure. Photoluminescence (PL) and radioluminescence (RL) spectroscopy confirmed energy transfer from Ce³⁺ to Tb³⁺ ions. Luminescence intensities were found to depend strongly on both Ce content and thermal treatment. Based on our measurements, a suitable Ce³⁺ concentration was identified. The results contribute to the understanding of defect-related quenching mechanisms and are relevant for the design of rare-earth-based luminescent nanomaterials for biomedical applications.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107536"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling the stochastic-deterministic boundary in luminescence: Consequences for dose estimation","authors":"Eren Şahiner","doi":"10.1016/j.radmeas.2025.107529","DOIUrl":"10.1016/j.radmeas.2025.107529","url":null,"abstract":"<div><div>Kinetic models based on deterministic ordinary differential equations (ODEs) are effective for macroscopic systems, but a breakdown of their foundational assumptions is observed for single-grain and nanodosimetric applications where particle numbers are small. In this study, the metrological consequences of this stochastic-deterministic divergence are quantitatively investigated. The study's primary contribution is to deconvolve the divergence into two distinct components: a robust, inherent imprecision and a model-dependent, systematic inaccuracy. Intrinsic physical stochasticity is confirmed to be a dominant source of imprecision, generating an irreducible dose uncertainty of over 20 % that accounts for a significant fraction of single-grain overdispersion. Conversely, a systematic inaccuracy (e.g., a &gt;50 % dose bias), initially observed in a simplified model, is demonstrated to be a methodological artifact, not a universal consequence of discreteness. It is shown that this systematic bias can be reduced to negligible levels (&lt;1 %) by using either a more physically realistic multi-trap model or a correctly specified simple model. Based on this deconvolution, analytical protocols are assessed. An \"Average-Dose-First\" protocol is identified as the superior method, as it provides an accurate final dose estimate while correctly propagating measurement uncertainty. A general framework for understanding and partitioning variance in luminescence data is thereby established. Practical recommendations are provided for improving the accuracy of modern luminescence science by selecting appropriate models and using correct statistical protocols, with a strong emphasis on the critical need for model validation.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107529"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Weighing options for passive environmental neutron dosimetry: A comparative study of PADCs, TLDs, OSLDs, and fission track detectors","authors":"Lily Bossin,&nbsp;Jeppe Brage Christensen,&nbsp;Federico Alejandro Geser,&nbsp;Malgorzata Kasprzak,&nbsp;Sabine Mayer,&nbsp;Malgorzata Sliz,&nbsp;Alberto Stabilini,&nbsp;Eduardo Gardenali Yukihara","doi":"10.1016/j.radmeas.2025.107504","DOIUrl":"10.1016/j.radmeas.2025.107504","url":null,"abstract":"<div><div>This study aims to evaluate the potential of polyallyl diglycol carbonate (PADC) detectors, coupled with <span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>LiF converters, for passive environmental neutron dosimetry. Their performance is compared against three other methods, fission track detectors, thermoluminescent detectors (TLDs), and optically stimulated luminescence detectors (OSLDs), to determine their viability for passive routine neutron monitoring in environmental settings.</div><div>The four detector types investigated (PADCs, fission tracks, TLDs and OSLDs) were placed in a moderator sphere and exposed to an AmBe neutron field. The measurements evaluated the dose response, measurement range, and precision of each system.</div><div>Results confirm that the advantage of the track detectors (PADC or fission track) is their gamma insensitivity: the TLD and OSLD methods require the combination of neutron-sensitive with neutron-insensitive detectors, as both are gamma-sensitive. This translated into a detection limit <span><math><mrow><msup><mrow><mi>H</mi></mrow><mrow><mo>∗</mo></mrow></msup><mrow><mo>(</mo><mn>10</mn><mo>)</mo></mrow></mrow></math></span>=6<!--> <!-->μ<!--> <!-->Sv for PADC detectors coupled with <span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>LiF converters, comparable to that of fission track detectors (3<!--> <!-->μ<!--> <!-->Sv). In contrast, the gamma-sensitive luminescence systems showed a detection limit of 10<!--> <!-->μ<!--> <!-->Sv for the TLDs and 180<!--> <!-->μ<!--> <!-->Sv for the OSLDs under AmBe neutron irradiations. This worsens under simulated environmental conditions, where a significant gamma contribution is expected, as demonstrated by a test where mixed gamma/neutron irradiation was used.</div><div>These results indicate the potential of the PADC coupled with a <span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>LiF converter system as a robust alternative to fission track detectors for passive environmental neutron dosimetry.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107504"},"PeriodicalIF":2.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a phoswich detector for low-energy gamma rays emitted from alpha emitters","authors":"Yuki Morishita ,&nbsp;Tsutomu Yamada ,&nbsp;Takamasa Nakasone ,&nbsp;Marina Kanno ,&nbsp;Miyuki Sasaki ,&nbsp;Yukihisa Sanada ,&nbsp;Tatsuo Torii","doi":"10.1016/j.radmeas.2025.107502","DOIUrl":"10.1016/j.radmeas.2025.107502","url":null,"abstract":"<div><div>The decommissioning of the Fukushima Daiichi Nuclear Power Station requires thorough inspection of piping for contamination, including alpha nuclides. Since external alpha particle measurements are impractical, detection relies on gamma-rays emitted by the alpha nuclides. Therefore, a phoswich detector for detecting low-energy gamma-rays was developed and experimentally validated. The detector was designed with consideration of energy deposition characteristics and consists of YAP:Ce or High Energy Resolution Gd₃(Ga,Al)₅O₁₂(Ce) (HR-GAGG) scintillators in combination with BGO scintillators, employing a photomultiplier tube for signal amplification. Validation procedures included Monte Carlo simulations and measurements using actual radiation sources. Both measurement and simulation results demonstrate a correlation in scintillator energy depositions across different gamma-ray energies. Pulse Shape Discrimination (PSD) plots effectively differentiate between low-energy and high-energy gamma-rays, thereby confirming the predictions from simulations. The combination of YAP:Ce and BGO with a digitizer enables detection of low energy gamma-rays and high energy gamma-rays. With the 0.5 mm thick YAP:Ce scintillator, the energy resolution was 29.1 % FWHM at 59.5 keV. Figure of Merit (FOM) was evaluated as 1.97. The detection efficiency for 60 keV gamma-rays was about 14 %. These results suggest promising potential for developing a sensitive low-energy gamma-ray detector utilizing various scintillator combinations. The phoswich detector shows promise for effectively detecting low-energy gamma-rays emitted by alpha nuclides in piping.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107502"},"PeriodicalIF":2.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144841105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perovskite scintillators for X-ray detection and imaging","authors":"Yongqi Huang,&nbsp;Yang (Michael) Yang","doi":"10.1016/j.radmeas.2025.107497","DOIUrl":"10.1016/j.radmeas.2025.107497","url":null,"abstract":"<div><div>Perovskite scintillators have emerged as one class of competitive scintillators for next-generation X-ray detection and imaging due to their unique properties, including high atomic number (Z), superior radiation absorption capability, high photoluminescence quantum yield (PLQY), ultrafast response time, excellent spatial resolution, and low-cost fabrication. The tunable structure and versatile chemical compositions of perovskite scintillators provide distinguishable advantages over traditional inorganic scintillators for optimizing scintillation performance. This review briefly outlines the historical development of scintillators and categorizes perovskite-based scintillators based on their structural characteristics, introducing key performance parameters and evaluation criteria. Recent progress is then summarized in three major application domains: high-resolution X-ray imaging, ultrafast dynamic imaging, and multi-energy spectral imaging. The discussion highlights representative achievements and technical challenges associated with light yield, temporal response, and image resolution. Finally, current research bottlenecks, such as poor environmental stability, fabrication complexity, and system integration issues, are examined, and potential strategies for future development are proposed, including material optimization, structural engineering, and interdisciplinary system-level integration. This review aims to provide a comprehensive understanding of perovskite scintillators and promote their practical implementation in advanced radiation detection technologies.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107497"},"PeriodicalIF":2.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The performance of a planar CdZnTe thermal neutron detector","authors":"Yu Xiang ,&nbsp;Xiaopan Jiang ,&nbsp;Bin Tang ,&nbsp;Xu Chen ,&nbsp;Xiaoxuan Li ,&nbsp;Xianchao Huang ,&nbsp;Zhiming Zhang ,&nbsp;Cunfeng Wei ,&nbsp;Long Wei","doi":"10.1016/j.radmeas.2025.107514","DOIUrl":"10.1016/j.radmeas.2025.107514","url":null,"abstract":"<div><div>The nuclide ¹¹³Cd is sensitive to thermal neutrons. Most of the gamma rays generated from ¹¹³Cd<span><math><mrow><msup><mrow><mrow><mo>(</mo><mi>n</mi><mo>,</mo><mi>γ</mi><mo>)</mo></mrow></mrow><mrow><mn>114</mn></mrow></msup><mi>Cd</mi></mrow></math></span> reactions have an energy of 558 keV. CdZnTe detectors contain Cd-113. Their good energy resolution for gamma rays ensures that they can identify the thermal neutrons by detecting the prompt gamma rays. Planar CdZnTe detectors are easy to manufacture and therefore cheap. Nonetheless, they have not yet been utilized in thermal neutron detection since their spectra lack the 558 keV photopeak, which is essential for identifying neutron capture events. In this paper, a 22 mm<span><math><mo>×</mo></math></span>22 mm<span><math><mo>×</mo></math></span>0.5 mm planar CdZnTe detector was used to detect the thermal neutrons from the No. 20 neutron beam line of China Spallation Neutron Source. A special detection method was applied to distinguish thermal neutrons from background radiation so that the planar detector was able to detect thermal neutrons. The intrinsic total detection efficiency of the detector for thermal neutrons was measured as 6.58%<span><math><mo>±</mo></math></span>0.76%. The result demonstrates that planar CdZnTe detectors are also able to serve as thermal neutron detectors.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107514"},"PeriodicalIF":2.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}